Source : Colin Tudge (1993). “Last Animals at the Zoo: How Mass Extinction Can Be Stopped”, p.15, Island Press
Colin Tudge#Intelligent Quotes #Evil Quotes #Trying Quotes
Source : "Bartlett's Familiar Quotations" by John Bartlett, 10th ed., 1919.
Source : Speech at the Nobel Banquet, www.nobelprize.org. December 10, 2001.
Source : H. A. Guerber (1910). “Myths & Legends of the Middle Ages”
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